Libtool performance status (part 1.2965)

[Bob Friesenhahn]

Tonight I did some test timings of building GraphicsMagick 1.2 under 
Solaris 10.  This time around I did a non-parallel build.  I tested 
with the nefarious libtool 1.5.26 as well as various 2.X versions. 
Most tests used bash by default, but the last test run is with 
libtool-head and the 'dash' shell.

It is clear to see that libtool 2.2 is vastly more efficient than the 
much maligned 1.5.26.  It is also clear that the head version has 
improved its run times over 2.2.2.  It is clear that 'dash' (aptly 
named) is faster than 'bash' ("The World's Slowest Shell" (TM)).

Obviously time is better spent updating packages to use libtool 2.2.X 
rather than spinning the wheels adding a 'Dolt' shim layer.  Someone 
should look under the covers and tune up bash as well.  The 
improvement in system times (1:25.275 vs 41.018) is outrageous, and 
even though compilation is a CPU bound actity, the user times have 
improved noticeably as well.

GraphicsMagick 1.2 build times
==============================

configured by /home/bfriesen/src/graphics/GraphicsMagick-head/configure, 
generated by GNU Autoconf 2.62,
  with options "'CFLAGS=-g -O2' 'CXXFLAGS=-g -O' '--enable-libtool-verbose' 
'--with-quantum-depth=16' '--enable-shared' '--with-modules' '--without-fpx' 
'--without-perl'"

libtool 1.5.26:
real     4:53.877
user     3:26.912
sys      1:25.275

libtool 2.2:
real     4:10.695
user     3:20.720
sys        45.651

libtool 2.2.2:
real     4:10.487
user     3:20.956
sys        45.777

libtool 1.2965 2008-04-22 (bash)
real     4:03.745
user     3:19.232
sys        41.018

libtool 1.2965 2008-04-22 (dash)
real     3:43.894
user     3:07.987
sys        34.191


======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/